Title:
紫外線透過フィルタ
Document Type and Number:
Japanese Patent JP7136301
Kind Code:
B2
Abstract:
Provided is an ultraviolet ray transmitting filter which has a plate thickness capable of supporting miniaturization of a device, and which has prescribed ultraviolet ray transmissive properties while sufficiently blocking visible light and near infrared light. The ultraviolet ray transmitting filter has an absorbent body. For a spectral transmittance curve of 250 to 1100nm wavelengths in respect to light with a 0° incidence angle: the full width at half maximum of the maximum transmission wavelength λTmax(0 ° ) in the range of 280-400nm wavelengths has a transmission wavelength band of at least 10nm; and the transmittance at the maximum transmission wavelength λTmax(0°) is at least 30%. When transmittance is standardized as 1 at the maximum transmission wavelength λTmax(0°), the average transmittance in respect to 400-1100nm wavelength light is no greater than 0.3. The thickness of the filter is no greater than 0.5mm.
Inventors:
Toshimasa Kakiuchi
Kazuhiko Shiono
Takashi Nagata
Kazuhiko Shiono
Takashi Nagata
Application Number:
JP2021154201A
Publication Date:
September 13, 2022
Filing Date:
September 22, 2021
Export Citation:
Assignee:
AGC Inc.
International Classes:
G02B5/22; C03C17/42; G02B5/26; G02B5/28
Domestic Patent References:
| JP2003139945A | ||||
| JP5341122A | ||||
| JP2017065980A |
Foreign References:
| WO2014030628A1 | ||||
| WO2011132786A1 | ||||
| WO2012137539A1 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito